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Repair tips

Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair

MakeModelProblemSolutionDate
Found: 4551
PhilipsMD2.25No sound - fault in separate sound psuTr7302 BU508AF s/c, R3300 6R8 o/c s/c on 16v line traced to AF o/p ic 7740 s/c14-09-04
PhilipsMD2.25dead - mains switch faultyreplace switch with improved type (coloured black). Use old part no, Philips will supply a new type14-09-04

PhilipsMD2.25 29PT8413Trips int leaving no sound/pic & st/by LED flashing cont.due to oxidised connections on the audio board pins - looked ok but resoldering cured14-09-04
PhilipsMD2.25 32PW9523excessive width with E/WIC7480 (482213011336) EW chip14-09-04
PhilipsMD2.25 32PW9523/25Width shrinks & reverts to st/by on bright scenesCurrent sense resistors R3546, R3547 0R39 in PSU had gone slightly high in value14-09-04
PhilipsMD2.25ECodenumber informationCodenumber information ---------------------- Long cable SSP <> CRT panel: 4822 320 11291. Set extention cables: 4822 310 11188. The extention cables are different from MD2.22E because use of other connectors. 14-09-04
PhilipsMD2.25ECorrection to position 21 of styling 220Correction to position 21 of styling 220 of Product Survey 1999-3 (3122 785 10300 The code numbers mentioned for the aluminium columns at position 21 of styling 220 are not correct. The correct code numbers must be: 21 4822 466 12216 Aluminium colum14-09-04
PhilipsMD2.25ECrackling noise coming from the picture tubeCrackling noise coming from the picture tube during light/dark changes of the picture contents. Mount bleeder (4822 310 11113) between LOT and picture tube. If problem still exist Anti Crackling Coating (ACC) can be applied. The code number for this AC14-09-04
PhilipsMD2.25ECurtain effect just after a white vertical line (ringing phenomenon)To reduce the ringing phenomenon change the following positions on the Small Signal Panel: Position 4508 into 1k (4822 051 10102) Position 3537 into 1k (5322 117 12487) Position 3538 into 1k (5322 117 12487) Position 3565 into 1k (4822 051 10102) Po14-09-04
PhilipsMD2.25EE/W distortion and then switching to standbyCheck and replace if necessary position 7480 on the Large Signal Panel with IRF620FI (4822 130 63546). REMARKS : Introduced in production (25" and 29") in week 9912. IRIS symptom code: 233A 14-09-04
PhilipsMD2.25EInfluence from wireless dolby on channel 3Cause: The wireless dolby transmitter influences the 55.25 MHz on channel 3. The local oscillator from the tuner interferes with the wireless dolby transmitter frequency and this results in a cross pattern on channel 3 (55.25 MHz). Solution: - Add on pos14-09-04
PhilipsMD2.25ENo sound from left, right, centre and subwoofer speakersCheck on audio supply panel (AB, page 39) 7302, BU508AF, 4822 130 61265 3300, 6E8 5W, 4822 117 12681 If one or both are defective also check production code on transformer 5305. If production code on 5305 is between or equal to OP9802 and OP9824 then al14-09-04
PhilipsMD2.25ENoise (humming or low frequency whistle) coming from the picture tubeMount bleeder (4822 310 11113) between LOT and picture tube. If problem still exist Anti Crackling Coating (ACC) can be applied. The code number for this ACC is 4822 390 10166. The ACC is supplied with complete instructions how to apply. REMARKS 14-09-04
PhilipsMD2.25E 32PW9543/05Poor definitionTr7140 BD140 on crt base s/c14-09-04
PhilipsMG1.1 28PW6615At sw on st/by LED lights then goes amber & starts to flash - in prot modeSt/by relay 4822 280 10375. this is listed as 1P 5V 10A JW1AFSN14-09-04
PhilipsMG1.1E 28PW6615Cpoor audio level from rear speakers in dolby moderemove SMD resistor R3735 located on copper side of LHS of the large signal panel14-09-04
PhilipsMG1.1EAA 32PW6615/025Int start up with LED flashingrelay 1002 in psu pt no 2422 1320 740514-09-04
PhilipsMG2.1E 28PW9515/05Dead with LOPTr s/c - BU2520DFFor reliability do following mod - remove C2411, change C2413 to 10µ 100v, R3406 to 100R to alter line dr coupling from ac to dc14-09-04
PhilipsMG2.1E 32PW9523/05MStarts up, relays click then shuts down with LEDs flashingCheck relay 1010 - conducts only briefly at sw on in this case14-09-04
PhilipsMG3.1EAA 28PW9525/05Sound dist/fuzzyHi imp center speaker14-09-04
PhilipsMID2.25 29PT8413/25No off air sigs - just blue screenTuner faulty - replace top one of 3 x BF909R (marked M29) 4 legged SM Tr14-09-04
PhilipsMidi 1.1Dead - tripping with Eht briefly presentTr 7450 BC558 in prot cct14-09-04

PhilipsMidi 1.1No pic sound okCheck fuse 1463 630mA; tesla module 4822 212 32363; Tr 7400 BC327 diode 6400 1N414814-09-04
PhilipsNC3Black raster - sound & OSG Ok.IC TDA356514-09-04
PhilipsNC3Blank raster - sound okTDA3565 col dec chip14-09-04
PhilipsNC3Bright Raster with fb lines - sound okTDA4505 faulty14-09-04
PhilipsNC3Chopper tr blows at sw onR418 o/c & check for dry joints in chopper & LOP ccts & R407 560k14-09-04
PhilipsNC3CHOPPER TR SCCHECK R407 560k14-09-04
PhilipsNC3Deado/c mains sw - used Grundig type14-09-04
PhilipsNC3Deadchopper tr s/c dry joints T40214-09-04
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